Well i got my fans in the mail a week ago. The Dii cooler is doing a pretty good job. I had to shim part of the bracket to get the angle right so the cooler sits level at the right height. I still have to slow down to 30m/s on extreme overhangs, but that is not usually much of the print so it doesn't slow me down too much. There is an advanced setting in Cura for overhangs so most of my printing can run at the 100mm/s and just the difficult locations need to slow down for print quality.